<?php defined('_JEXEC')or die('Restricted access'); 

$filename = 'general.css';
$path = 'components/com_einsaetze/styles/';
echo JHTML::_('stylesheet', $filename, $path);  
echo JHTML::_('calendar', '', 'date1', 'input_date1', '%Y-%m-%d %H:%M', 'class="field"');

?>